James bruce



(No Model.)

J. BRUCE.

DIVING APPARATUS.

No. 861,925. Patented Apr. 26, 1887.

A TTOR/VEYS n. PETERS, PhoX0-Lilh6gmphen Washmmnn. I): 0

UNITED STATES PATENT, OFFICE.

, JAMES BRUCE, OF NE\V YORK, N. Y.

DIVING APPARATUS.

- SPECIFICATION forming part of Letters Patent No. 361,925, dated April 26, 1887.

Application filed January 13, 1%7. Serial No. 224,256. (No model.)

To aZZ whom it may concern:

Be it known that I, J AMES BRUCE, asubject of the Queen of Great Britain, residing at New York, in the county and State of New York, have invented new and useful Improvements in Diving Apparatus, of which the following is a specification.

This invention relates to improvements in diving apparatus, as set forth in the following specification and claims, and illustratedin-the accompanying drawing, which represent: a'

side elevation, partly in section, of a diving apparatus.

The letter A represents a helmet or hood adapted to sit over the head of a diver. A sight-hole, B, protected by a transparent inaterial-such as glass-ena blcs the diver to see objects outside of the helmet. An inlet-tube, O, supplies air to the interior of the helmet A, so that the diver can breathe. By providing the inlet-tube G with a flaring mouth, D, the entry of air into the inlettube is facilitated. The spent air is led from the helmet Aby the exit or outlet tube E. A supply of heat-such as a stove or lamp, G-is applied at or near the top or free end of the exit-tube E, so that said portion of the exit-tube Ebecomes heated and the air contained therein expands, and consequently rises, its place being taken up by air which rises from the helmet through said tube E. Since nature does not allow a vacuum, fresh air passes into the helmet through the tube 0, and a circulation of air will therefore take place from the mouth D, through tube G, helmet A, and tube E. If

the helmet rests upon the shoulders of the diver, this-circulation will still continue and not be disturbed by the action of the lungs of the diver. The foul air exhaled by the diver follows the current of air induced through the tube E by the expansion ofthe air at or near the top end of said tube, and a constant supply of fresh air is maintained in the helmet. By enlarging the portion F ofthe exit-tube at which the heat is applied said heat is enabled to act on a larger surface, thus accelerating the outflow of air from the exit-tube. By this circution of air the space in the helmet A is constantly supplied with fresh air. The free ends of the inlet-tube C and exit-tube E are secured to any suitable support-such, for example, as a float or boat, H.

What I claim as new, and desire to secureby Letters Patent, is-

1. The combination, with a helmet or hood, A,of an inlet-tube,C,an eXit-tube,E,and means for heating the free end of the exit-tube, substantially as set forth.

2. The combination, with ahelmet or hood, A,of aninlet-tube,0, an cxittube, E, provided with an enlargement, F, and means for supplying heat at said enlargement F, substantially as set forth.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

JAMES BRUCE. [L. s]

\Vitnesscsi W. HAUFF, E. I KASTENHUBER. 

